Re: ATM Source for "OFF-The shelf" half stepping -stepper controller

["Simon Mander" <compulsion@btinternet.com>]

Woops, was it. my company kindly "purchsed" it for me. Did not realy look at
the price.

BTW Chirs, Do you want the SAA1027 back ? I could not get the board I built
to run properly.

----- Original Message -----
From: Heapy Chris CG <Chris.Heapy@astrazeneca.com>
To: ATM <atm@shore.net>; 'Simon Mander' <compulsion@btinternet.com>
Sent: Friday, August 25, 2000 11:01 AM
Subject: RE: ATM Source for "OFF-The shelf" half stepping -stepper
controller


Cost appears to be double what you say? £40.55 for 1-4 units.

Chris Heapy


> I have found a good source for a stepper motor driver board.
>
> rswww.com
>
> Part number is 240-7920
>
> Long link should work though if you copy and paste it into IE,
>
> http://rswww.com/itc/scripts/Module.jsp?BV_SessionID=@@@@1548236558.096719
> 38
> 19@@@@&BV_EngineID=ealijdffijibemfcfkmcggcg.0&usertype=account&productID=2
> 40
> 7920
>
> Its a great little board, has selectable half-stepping as well. Can use
> the
> on board clock that ranges from 20hz to 600hz. Adjustable with a 1M pot.
> This is a little fast for our purposes, In order to drive my barndoor
> tracker I used a 5:1 gearbox. In order to get down to the speed I needed
> (16.667hz ish) I had to remove the pot and add a further 100k resistor in
> series. Alternativly you could build an external quartz clock to drive the
> board.
> Cost from RS is only £20.
>
> Cheers.
>
>
>